... are professional in manufacturing high level cotton gin saws and export for many years Our Advantages1. Hardness:For the ... to 30-36 ,But due to our superb and exclusice heat treatment technology , which guarantee the teeth heard ... have excellent flexibility which guaranty the teeth hard and unbreakable, it have long lifeTeeth form, number of teeth ... 142-181"/457.2mm7-15/16"/201.61mm396 textile machinery